I submitted a feature request to bugzilla
(
http://bugzilla.wikimedia.org/show_bug.cgi?id=2001) for client-side
sorting of table fields with JavaScript, there are some bugs in it
currently which I don't know how to fix.
You can see a testcase I uploaded here:
http://bugzilla.wikimedia.org/attachment.cgi?id=471&action=view